Let's Look at Water
Shows how a city's water supply is purified at a filtration plant. The complex system of the underground mains that supply the city with water is also illustrated, as is the safeguarding of water supplies on trains, ships and aircraft.
- 1946
- 0 Hrs 22 Mins
- Documentary, Other
Shows how a city's water supply is purified at a filtration plant. The complex system of the underground mains that supply the city with water is also illustrated, as is the safeguarding of water supplies on trains, ships and aircraft.